Use of Sulphite Cellulose Extract as a Tanning Material Page: 321
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Bwkers] Sulphide Cellulose for Tanning 321
Following are briefly summarized the results of the investigation
to indicate the value of sulphite cellulose extracts as tanning materials:
A. These extracts contain a satisfactory amount of tannins
(material absorbable by hide powder) as determined by the gen-
erally accepted methods and compare favorably with vegetable
tanning extracts in this respect.
B. The material in these extracts appears to be as firmly fixed
by hide powder as the tannins from vegetable tanning extracts.
C. These extracts may be blended with the ordinary vegetable
extracts without loss of tannin content in the blend as determined
D. Color tests show them to be satisfactory for use in tanning.
E. Leather of good quality can be produced either by pretanning
with these extracts and finishing with the ordinary vegetable extracts
or-by tanning with a blend of these and vegetable extracts. ::
F. The chemical, physical, and aging properties of the leather
tanned with these materials compare favoraAly with those of leathers
tanned without their use.
G. Their use as a pretannage or in blends with vegetable materials
reduces the time required to produce leather of the same degree of
tannage as is produced by the use of the ordinary vegetable tanning
From the results of this investigation it is concluded that sulphite
cellulose extracts have a value for tanning purposes, particularly
when blended with the ordinary vegetable extracts. Their use
would benefit the tanner by virtue of lowered production costs to
the extent that they could be substituted for more costly materials
and by decreasing the time required for tanning. The increased
use of sulphite cellulose extracts would directly benefit the paper-
pulp producer and be of national economic benefit through the
utilization of a material now largely wasted.
WASHINGTON, November 1, 1926.
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Wallace, E. L. & Bowker, Roy Clement. Use of Sulphite Cellulose Extract as a Tanning Material, report, November 1, 1926; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc66515/m1/15/: accessed April 29, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.